Analysis of To The Moonbeam

I.
Moonbeam, leave the shadowy vale,
To bathe this burning brow.
Moonbeam, why art thou so pale,
As thou walkest o'er the dewy dale,
Where humble wild-flowers grow?
Is it to mimic me?
But that can never be;
For thine orb is bright,
And the clouds are light,
That at intervals shadow the star-studded night.

II.
Now all is deathy still on earth;
Nature’s tired frame reposes;
And, ere the golden morning’s birth
Its radiant hues discloses,
Flies forth its balmy breath.
But mine is the midnight of Death,
And Nature's morn
To my bosom forlorn
Brings but a gloomier night, implants a deadlier thorn.

III.
Wretch! Suppress the glare of madness
Struggling in thine haggard eye,
For the keenest throb of sadness,
Pale Despair's most sickening sigh,
Is but to mimic me;
And this must ever be,
When the twilight of care,
And the night of despair,
Seem in my breast but joys to the pangs that rankle there.